Zte ZXG10 OB06, Technical Manual

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ZXG10 OB06 ZTE Integrated Outdoor GSM Base Station Technical Manual
28 Confidential and Proprietary Information of ZTE CORPORATION
An O&M timeslot on the Abis interface is multiplexed in each site, and the
O&M signaling at different sites occupies the fixed timeslot on the Abis
interface. During the CMM initialization, the CMM reads the ID signal from
the cabinet top to locate the TS of the O&M signaling on the Abis interface.
For detailed description of ID, refer to
ZXG10 OB06 (V1.0) Compact
Outdoor BTS for GSM Hardware Manual .
For example, the site that is directly connected to BSC occupies the TS 30
Link A for O&M signaling, while the level-1 cascaded site occupies the TS
28 Link A for O&M signaling. The rest may be deduced by analogy. If the
previous-level faulty E1 interface is bridged, the next-level site can identify
the O&M channel corresponding to the site. The level of the site can be
read out on the DIP switch on the CMM board.
The Abis interface has four types of TSs: TCH TS for TRM service, FUL TS
for TRM signaling, O&M TS and EAM TS for transparent environment
monitoring channel.
The Abis interface processing is as follows:
1. Transparently transmit the TCH, FUL, O&M and EAM between cascaded
sites.
2. Downlink direction inside a site: The TCH and FUL signaling are
transparently transmitted to each TRM. The Q&M will be transparently
switched to the QMC interface of CMM in each cabinet. The CMM will
identify the O&M signaling according to TEI. EAM will be transparently
transmitted by the base cabinet.
3. Uplink direction inside a site: The TCH signaling is transmitted
transparently. The FUL signaling in the same cabinet is compressed
and packed in the CMM. The O&M signaling is multiplexed based on TEI,
and the EAM signaling is transmitted transparently in the base cabinet.
Um Interface
The Um interface is the interface between OB06 to MS, an important
external interface of the OB06.
In the PLMN, MS connects the fixed part of the network through a radio
channel to enable subscribers to access communication services.
To interconnect the MS and OB06, a series of stipulations are provided for
signal transmission over the radio channel, and a set of standards is set up.
This set of specifications about signal transmission over radio channel is
the Um interface.